Abstract: A squirrel-proof post is composed of a post, supporting a bird feeder or bird house, an annular sleeve, a set of springs, and a means of securing the springs to both the platform supporting the bird feeder or house and to the sleeve. The set of springs will be naturally somewhat elongated due to the weight of the sleeve. When the squirrel climbs up the post and onto the sleeve or else jumps from the ground onto the sleeve, the additional weight will cause the sleeve to begin to slide down the post at a rate approximating free fall. This sudden and rapid acceleration induces the squirrel to immediately jump off the sleeve, returning to the ground unharmed. The reduction in weight acting in opposition to the restoring force of the springs will rapidly result in the return of the sleeve toward its equilibrium position.